Match all of the values specified in an array in Mongoose

Question

so i want to run a mongoose query to find posts where all the searcharray tags are present.

The tags vary in amount.

Currently this returns posts where any of the tags are present.

Post.find({
        'tags.name': { 
            $in : searcharray
        }
    }, function(err, post) {

        console.log(post);

    }
);

I checked the docs and couldn't quite piece this one together.

Thanks

Answer 1

You want $all, which is basically an $and operation with shorter syntax much as $in is an $or operation with shorter syntax:

Post.find({"tags.name": { "$all": searcharray } }, function(err, posts) {
        console.log(posts);
});

That requires that your "tags" array has members matching "name" for "all" of the items specified in the searchArray list.

As an "or" condition the $in whould just recall any documents that contained at least one of the items, so the "and" condition means all of the items.